Deprecate `IgnoredMethods` option

[koic]

Follow up https://github.com/rubocop/rubocop/pull/10829.

This PR deprecates IgnoredMethods option in integrate to AllowedMethods and AllowedPatterns option. It requires RuboCop 1.33.0 or higher.

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Before submitting the PR make sure the following are checked:

• [x] The PR relates to only one subject with a clear title and description in grammatically correct, complete sentences.
• [x] Wrote good commit messages.
• [ ] Commit message starts with [Fix #issue-number] (if the related issue exists).
• [x] Feature branch is up-to-date with master (if not - rebase it).
• [x] Squashed related commits together.
• [x] Added tests.
• [x] Ran bundle exec rake default. It executes all tests and runs RuboCop on its own code.
• [x] Added an entry (file) to the changelog folder named {change_type}_{change_description}.md if the new code introduces user-observable changes. See changelog entry format for details.
• [x] If this is a new cop, consider making a corresponding update to the Rails Style Guide.

[koic]

https://github.com/rubocop/rubocop/pull/10831 is required to resolve the build errors.

[co-anton-s]

@koic When is a release expected with these changes?

[koic]

Scheduled for the second half of this week. Please wait for a little while.

[co-anton-s]

Scheduled for the second half of this week. Please wait for a little while.

Good. Thank you!

[koic]

@anton-co RuboCop Rails 2.16 has been released. Thank you! https://github.com/rubocop/rubocop-rails/releases/tag/v2.16.0